Credits

Notes on Function

All css is compiled on save unless the transient has expired. If which case a query is run to compile the css durning rendering.
I may add option to use either a wp_option or a transient based upon user preferance.

Css is compiled by menu_order. I would like to add more options for better sorting.

There is an options page that outputs the css into a textarea so that you can review the final css in the dashboard.